Lung test

[brinnie]

I managed to get my lips to go blue,on the 6 minute walk test.

And the following day a repeat on the lung function test.

Is this normal.

[O2Trees]

Not sure whether you mean is it normal to have the blue lips, or is having the lung function test the next day normal, which i'd say is good follow-up.

The blue lips means you are cyanotic = your blood oxygen is very low - so no, not normal, and certainly not good for you. Presumably you had a pulse oximeter on your finger to measure the oxygen while doing the 6MWT? This would show what your oxygen levels are during exertion, and the lung function test will give a more general picture of how you function, including the level of obstruction in your lungs (FEV1).